Patents by Inventor Yoshihiko Yamamura
Yoshihiko Yamamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230071139Abstract: A sensor element includes an element body that contains a measurement-object gas flow section and a heat generation portion. The measurement-object gas flow section includes a main pump chamber, an auxiliary pump chamber, and a measurement chamber. A distance X1 in a left-right direction between a part of a first inner linear portion and a part of a second inner linear portion of the heat generation portion that overlap a main pump chamber projection region is equal to or more than ? of a width Wp of the main pump chamber projection region in the left-right direction. A distance X2 in the left-right direction between a part of the first inner linear portion and a part of the second inner linear portion that overlap an auxiliary pump chamber projection region is equal to or more than 0.4 times the width Wp.Type: ApplicationFiled: August 15, 2022Publication date: March 9, 2023Inventors: Satoru HASHIMOTO, Shingo SOKAWA, Yoshihiko YAMAMURA, Kosuke UJIHARA
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Patent number: 10892530Abstract: Disclosed is an air electrode for a metal-air battery, the air electrode including a separator composed of a hydroxide-ion-conductive inorganic solid electrolyte being a dense ceramic material, and an air electrode layer disposed on the separator and containing an air electrode catalyst, an electron-conductive material, and a hydroxide-ion-conductive material, or containing an air electrode catalyst also serving as an electron-conductive material and a hydroxide-ion-conductive material. According to the present invention, the reaction resistance of the air electrode including the dense ceramic separator can be significantly reduced in a metal-air battery while ensuring the desired characteristics of the dense ceramic separator.Type: GrantFiled: September 26, 2016Date of Patent: January 12, 2021Assignee: NGK Insulators, Ltd.Inventors: Yoshihiko Yamamura, Tatsuya Hattori, Naomi Saito, Naohito Yamada
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Patent number: 10644327Abstract: A fuel cell cathode contains a perovskite oxide as a main component. The perovskite oxide is expressed by the general formula ABO3 and including La and Sr at the A site. A solid electrolyte layer is disposed between an anode and the cathode. The cathode has a surface on an opposite side to the solid electrolyte layer. A first ratio of a Sr concentration relative to an La concentration is less than or equal to 4 times a second ratio of the Sr concentration relative to the La concentration. The first ratio is detected by the use of X-ray photoelectron spectroscopy on the surface of the cathode. The second ratio of a Sr concentration relative to a La concentration is detected by the use of X-ray photoelectron spectroscopy on an exposed surface exposed by surface processing of the surface and positioned within 5 nm of the surface in relation to a direction of thickness.Type: GrantFiled: January 4, 2018Date of Patent: May 5, 2020Assignee: NGK INSULATORS, LTD.Inventors: Shinji Fujisaki, Yoshihiko Yamamura, Takashi Ryu, Makoto Ohmori
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Patent number: 10601094Abstract: Provided is a separator-equipped air electrode for a metal-air battery, the separator-equipped air electrode including a separator composed of a hydroxide-ion-conductive inorganic solid electrolyte being a dense ceramic material; an air electrode layer containing an air electrode catalyst and an electron-conductive material, or containing an air electrode catalyst also serving as an electron-conductive material; and an intermediate layer disposed between the separator and the air electrode layer, improving the adhesion between the separator and the air electrode layer, and exhibiting hydroxide ion conductivity. The present invention enables an air electrode provided with a dense ceramic separator to ensure the desired characteristics of the dense ceramic separator and reduces the resistance of a metal-air battery (in particular, the interfacial resistance between the air electrode layer and the separator).Type: GrantFiled: December 21, 2016Date of Patent: March 24, 2020Assignee: NGK Insulators, Ltd.Inventors: Tatsuya Hattori, Yoshihiko Yamamura, Naohito Yamada
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Patent number: 10516168Abstract: A fuel cell has an anode, a cathode and a solid electrolyte layer. The cathode contains a perovskite oxide as a main component. The perovskite oxide is expressed by a general formula ABO3 and includes at least Sr at the A site. The solid electrolyte layer is disposed between the anode and the cathode. The cathode includes a surface region which is within 5 ?m from a surface opposite the solid electrolyte layer. The surface region contains a main phase containing the perovskite oxide and a secondary phase containing strontium sulfate. An occupied surface area ratio of the secondary phase in a cross section of the surface region is greater than or equal to 0.25% to less than or equal to 8.5%.Type: GrantFiled: December 7, 2017Date of Patent: December 24, 2019Assignee: NGK INSULATORS, LTD.Inventors: Makoto Ohmori, Shinji Fujisaki, Yoshihiko Yamamura, Takashi Ryu
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Patent number: 10193163Abstract: A fuel cell comprises an anode, a cathode, and a solid electrolyte layer disposed between the anode and the cathode. The cathode includes a perovskite oxide as a main component. The perovskite oxide is expressed by the general formula ABO3 and includes at least one of La and Sr at the A site. The cathode includes a surface region that is within 5 micrometers from the surface opposite the solid electrolyte layer. The surface region contains a main phase configured by the perovskite oxide and a secondary phase that is configured by strontium oxide. The occupied surface area ratio of the secondary phase in a cross section of the surface region is greater than or equal to 0.05% to less than or equal to 3%.Type: GrantFiled: November 14, 2016Date of Patent: January 29, 2019Assignee: NGK INSULATORS, LTD.Inventors: Makoto Ohmori, Shinji Fujisaki, Yoshihiko Yamamura, Takashi Ryu
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Publication number: 20180131007Abstract: The fuel cell according to the present invention has an anode, a cathode and a solid electrolyte layer. The cathode contains a perovskite oxide as a main component. The perovskite oxide is expressed by the general formula ABO3 and including La and Sr at the A site. The solid electrolyte layer is disposed between the anode and the cathode. The cathode has a surface on opposite side to the solid electrolyte layer. A first ratio of a Sr concentration relative to an La concentration is less than or equal to 4 times a second ratio of the Sr concentration relative to the La concentration. The first ratio is detected by use of X-ray photoelectron spectroscopy on the surface of the cathode. The second ratio of a Sr concentration relative to a La concentration is detected by use of X-ray photoelectron spectroscopy on an exposed surface. The exposed surface is exposed by surface processing of the surface. The exposed surface is positioned within 5 nm of the surface in relation to a direction of thickness.Type: ApplicationFiled: January 4, 2018Publication date: May 10, 2018Inventors: Shinji FUJISAKI, Yoshihiko YAMAMURA, Takashi RYU, Makoto OHMORI
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Publication number: 20180102551Abstract: A fuel cell has an anode, a cathode and a solid electrolyte layer. The cathode contains a perovskite oxide as a main component. The perovskite oxide is expressed by a general formula ABO3 and includes at least Sr at the A site. The solid electrolyte layer is disposed between the anode and the cathode. The cathode includes a surface region which is within 5 ?m from a surface opposite the solid electrolyte layer. The surface region contains a main phase comprising the perovskite oxide and a secondary phase comprising strontium sulfate. An occupied surface area ratio of the secondary phase in a cross section of the surface region is greater than or equal to 0.25% to less than or equal to 8.5%.Type: ApplicationFiled: December 7, 2017Publication date: April 12, 2018Inventors: Makoto OHMORI, Shinji FUJISAKI, Yoshihiko YAMAMURA, Takashi RYU
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Patent number: 9926642Abstract: An object of the present invention is to manufacture single crystals of high quality on an industrial production scale by preventing impurities from being mixed in single crystals when the single crystals are produced by the solvothermal method. A pressure vessel body 1, in which a supercritical state is maintained, is made of heat resistant alloy, a portion of the pressure vessel body is open, a corrosion-resistant mechanical lining 5 is provided on an inner face of the pressure vessel and on an entire outer circumferential edge of the opening, and the opening is sealed by an airtight mating face formed out of a corrosion-resistant mechanical lining, which is formed on the outer circumferential edge of the opening, and by an airtight mating face of the corrosion-resistant mechanical lining cover 6 on an inner face of the cover 3 through a corrosion-resistant gasket member.Type: GrantFiled: March 13, 2015Date of Patent: March 27, 2018Assignees: FURUYA METAL CO., LTD., MITSUBISHI CHEMICAL CORPORATION, THE JAPAN STEEL WORKS, LTD.Inventors: Yuji Sasagawa, Osamu Wakao, Yoshihiko Yamamura, Shigeharu Akatsuka, Keiichiro Matsushita
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Patent number: 9849610Abstract: For heating a mold efficiently and uniformly and for protecting an induction coil from corrosive gases, an upper plate that contacts an upper end face of a mold, and a lower plate that contacts a lower end face of the mold are provided, and an induction coil, provided to each plate, has a voltage applied by a commercial power supply. Each plate has a metal plate body in which a recessed housing portion that houses the induction coil is formed, and a cover that closes the recessed housing portion in a state where the induction coil is housed therein. A cover placement portion having a step that is greater than or equal to the thickness of the metal cover is formed in the metal plate body, and a plurality of jacket chambers in which a gas-liquid two phase heating medium is enclosed are formed in the metal plate body.Type: GrantFiled: August 6, 2013Date of Patent: December 26, 2017Assignees: TOKUDEN CO., LTD., BRIDGESTONE CORPORATIONInventors: Toru Tonomura, Yasuhiro Fujimoto, Yoshihiko Yamamura, Hideyuki Osamura, Akihiko Hajikano
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Publication number: 20170362717Abstract: Provided is an air electrode or water electrolysis anode showing a higher catalytic activity than carbon black and not having a risk of oxidative degradation, in particular, an air electrode or water electrolysis anode for a metal-air battery or a water electrolysis apparatus. The air electrode or water electrolysis anode includes an electron-conductive material represented by LaNi1?x?yCuxFeyO3?? (where x>0, y>0, x+y<1, and 0???0.4).Type: ApplicationFiled: August 29, 2017Publication date: December 21, 2017Inventors: Tatsuya HATTORI, Yoshihiko YAMAMURA, Kenshin KITOH, Naohito YAMADA, Naomi SAITO
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Publication number: 20170104254Abstract: Provided is a separator-equipped air electrode for a metal-air battery, the separator-equipped air electrode including a separator composed of a hydroxide-ion-conductive inorganic solid electrolyte being a dense ceramic material; an air electrode layer containing an air electrode catalyst and an electron-conductive material, or containing an air electrode catalyst also serving as an electron-conductive material; and an intermediate layer disposed between the separator and the air electrode layer, improving the adhesion between the separator and the air electrode layer, and exhibiting hydroxide ion conductivity. The present invention enables an air electrode provided with a dense ceramic separator to ensure the desired characteristics of the dense ceramic separator and reduces the resistance of a metal-air battery (in particular, the interfacial resistance between the air electrode layer and the separator).Type: ApplicationFiled: December 21, 2016Publication date: April 13, 2017Applicant: NGK INSULATORS, LTD.Inventors: Tatsuya HATTORI, Yoshihiko YAMAMURA, Naohito YAMADA
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Publication number: 20170062837Abstract: A fuel cell comprises an anode, a cathode, and a solid electrolyte layer disposed between the anode and the cathode. The cathode includes a perovskite oxide as a main component. The perovskite oxide is expressed by the general formula ABO3 and includes at least one of La and Sr at the A site. The cathode includes a surface region that is within 5 micrometers from the surface opposite the solid electrolyte layer. The surface region contains a main phase configured by the perovskite oxide and a secondary phase that is configured by strontium oxide. The occupied surface area ratio of the secondary phase in a cross section of the surface region is greater than or equal to 0.05% to less than or equal to 3%.Type: ApplicationFiled: November 14, 2016Publication date: March 2, 2017Inventors: Makoto OHMORI, Shinji FUJISAKI, Yoshihiko YAMAMURA, Takashi RYU
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Publication number: 20170012334Abstract: Disclosed is an air electrode for a metal-air battery, the air electrode including a separator composed of a hydroxide-ion-conductive inorganic solid electrolyte being a dense ceramic material, and an air electrode layer disposed on the separator and containing an air electrode catalyst, an electron-conductive material, and a hydroxide-ion-conductive material, or containing an air electrode catalyst also serving as an electron-conductive material and a hydroxide-ion-conductive material. According to the present invention, the reaction resistance of the air electrode including the dense ceramic separator can be significantly reduced in a metal-air battery while ensuring the desired characteristics of the dense ceramic separator.Type: ApplicationFiled: September 26, 2016Publication date: January 12, 2017Applicant: NGK INSULATORS, LTD.Inventors: Yoshihiko YAMAMURA, Tatsuya HATTORI, Naomi SAITO, Naohito YAMADA
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Patent number: 9127372Abstract: An object of the present invention is to manufacture single crystals of high quality on an industrial production scale by preventing impurities from being mixed in single crystals when the single crystals are produced by the solvothermal method. A pressure vessel body 1, in which a supercritical state is maintained, is made of heat resistant alloy, a portion of the pressure vessel body is open, a corrosion-resistant mechanical lining 5 is provided on an inner face of the pressure vessel and on an entire outer circumferential edge of the opening, and the opening is sealed by an airtight mating face formed out of a corrosion-resistant mechanical lining, which is formed on the outer circumferential edge of the opening, and by an airtight mating face of the corrosion-resistant mechanical lining cover 6 on an inner face of the cover 3 through a corrosion-resistant gasket member.Type: GrantFiled: January 11, 2006Date of Patent: September 8, 2015Assignees: THE JAPAN STEEL WORKS, LTD., MITSUBISHI CHEMICAL CORPORATION, FURUYA METAL CO., LTD.Inventors: Yuji Sasagawa, Osamu Wakao, Yoshihiko Yamamura, Shigeharu Akatsuka, Keiichiro Matsushita
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Publication number: 20150217484Abstract: For heating a mold efficiently and uniformly and for protecting an induction coil from corrosive gases, an upper plate that contacts an upper end face of a mold, and a lower plate that contacts a lower end face of the mold are provided, and an induction coil, provided to each plate, has a voltage applied by a commercial power supply. Each plate has a metal plate body in which a recessed housing portion that houses the induction coil is formed, and a cover that closes the recessed housing portion in a state where the induction coil is housed therein. A cover placement portion having a step that is greater than or equal to the thickness of the metal cover is formed in the metal plate body, and a plurality of jacket chambers in which a gas-liquid two phase heating medium is enclosed are formed in the metal plate body.Type: ApplicationFiled: August 6, 2013Publication date: August 6, 2015Inventors: Toru Tonomura, Yasuhiro Fujimoto, Yoshihiko Yamamura, Hideyuki Osamura, Akihiko Hajikano
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Publication number: 20150182928Abstract: An object of the present invention is to manufacture single crystals of high quality on an industrial production scale by preventing impurities from being mixed in single crystals when the single crystals are produced by the solvothermal method. A pressure vessel body 1, in which a supercritical state is maintained, is made of heat resistant alloy, a portion of the pressure vessel body is open, a corrosion-resistant mechanical lining 5 is provided on an inner face of the pressure vessel and on an entire outer circumferential edge of the opening, and the opening is sealed by an airtight mating face formed out of a corrosion-resistant mechanical lining, which is formed on the outer circumferential edge of the opening, and by an airtight mating face of the corrosion-resistant mechanical lining cover 6 on an inner face of the cover 3 through a corrosion-resistant gasket member.Type: ApplicationFiled: March 13, 2015Publication date: July 2, 2015Applicants: FURUYA METAL CO., LTD., THE JAPAN STEEL WORKS, LTD., MITSUBISHI CHEMICAL CORPORATIONInventors: Yuji SASAGAWA, Osamu WAKAO, Yoshihiko YAMAMURA, Shigeharu AKATSUKA, Keiichiro MATSUSHITA
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Patent number: 8865368Abstract: A novel electrode that can be used at high temperature in air, a fuel cell using the material, and a method of manufacture of the same are provided. The electrode material containing a component expressed by La1-sAsNi1-x-y-zCuxFeyBzO3-? (wherein, A and B are at least one element independently selected from the group consisting of alkaline earth metals, transition metals excluding Fe, Ni and Cu, and rare earths excluding La, and x>0, y>0, x+y+z<1, 0?s?0.05, and 0?z?0.05) exhibits relatively high conductivity at high temperature, and has the advantage of combination with other materials in relation to coefficient of thermal expansion.Type: GrantFiled: March 24, 2011Date of Patent: October 21, 2014Assignee: NGK Insulators, Ltd.Inventors: Masaharu Namba, Naomi Teratani, Yoshihiko Yamamura, Kazuyuki Matsuda, Naomi Fukui
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Patent number: 8841033Abstract: The present invention provides a ceramic material capable of demonstrating compactness and Li ion conductivity to an extent that enables the use of the ceramic material as a solid-state electrolyte material for a lithium secondary battery, or the like. A ceramic material containing Li, La, Zr, Nb and/or Ta, as well as O and having a garnet-type or garnet-like crystal structure is used.Type: GrantFiled: September 1, 2010Date of Patent: September 23, 2014Assignee: NGK Insulators, Ltd.Inventors: Yoshihiko Yamamura, Tatsuya Hattori, Toshihiro Yoshida, Akihiko Honda, Yosuke Sato
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Patent number: 8657955Abstract: It is provided a melt composition for growing a gallium nitride single crystal by flux method. The melt composition contains gallium, sodium and barium, and a content of barium is 0.05 to 0.3 mol % with respect to 100 mol % of sodium.Type: GrantFiled: August 3, 2009Date of Patent: February 25, 2014Assignees: NGK Insulators, Ltd, Osaka University, Toyoda Gosei Co., Ltd.Inventors: Makoto Iwai, Takanao Shimodaira, Yoshihiko Yamamura, Takatomo Sasaki, Yusuke Mori, Fumio Kawamura, Shiro Yamasaki